.bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: fixed;
  bottom: 0;
  left: 0;
  z-index: 2;
  width: 100%;
  height: .44rem;
  border-top: .01rem solid #ddd;
  background-color: #fff;
  box-sizing: border-box;
  padding-left: .15rem;

  span {
    font-size: .2rem;
    color: #f40;
  }

  button {
    height: .44rem;
    background-color: #f40;
    color: #fff;
    font-size: .16rem;
    padding: 0 .25rem;
  }
}